Hinged telescope sight mount



2:3".2-49. QR 29527a289 5?? ct. 24, 1950 R, E, ALLEN 2,527,289

HINGED TELESCOPE SIGHT MOUNT Filed May 1'7, 1948 2 Sheets-Sheet 1 Oct.24, 1950 R E, ALLEN 2,527,289

HINGED TELESCOPE SIGHT MOUNT Filed May 17, 1948 2 Sheets-$116911 2 lllfl IN VEN TOR.

Roy` E. Allen Patented Oct. 24, 1950 ollibll KUUM UNITED STATES PATENTOFFICE This invention relates to telescopic gun sights and particularlyto mounts adapting such sights to swing laterally from their usepositions. Except for long range shooting a telescopic sight is notadvantageous, and is an obstacle at short ranges to employing of theusual open sights which lend themselves to rapid firing. In recognitionof this fact, various laterally swingable telescopic sights have beendesigned, but without achieving various advantages `inherent in thepresent invention.

An object of the invention is to provide a swinging mounting for atelescopic gun sight, suited to be installed without mutilation of a gunor any detraction from the original design, and requirlng a minimum ofskill and effort to install.

Another object is to provide a mounting of the described charactersuited to frictionally retain the telescopic sight in its positions ofuse and non-use, and adapted to accurately regulate the friction appliedfor such purpose.

Another object is to provide a. swinging mounting for a telescopic sightthat will lend itself to convenient use of such internal focusing andwindage adjustments as are a common feature of such sights.

Another object is to minimize wear resulting from recoil stresses, ininstalling a swingable telescopic sight on a gun.

These and various other objects are attained by the constructionhereinafter described and illustrated in the accompanying drawings,wherein:

Fig. 1 is a top plan view of the receiver portion of a rifle, equippedwith my improved mounting for a telescope, showing the latter in useposition.

Fig. 2 is a side elevational view of the same.

Fig. 3 is a cross sectional view of ,the same, taken on the line 3-3 ofFig. 2.

Fig. 4 is a cross section similar to Fig. 3 but showing a non-useposition of the telescope.

Fig. 5 is across section taken on the line 5-5 of Fig. 2.

Fig. 6 is an enlarged sectional detail of a pivot of the improvedmounting, taken on the line 6-6 of Fig. 4.

Fig. 7 is a vertical sectional detail of the rear mounting plate, takenon the line 1-1 of Fig. 4.

In these views, the reference character I designates the receiver of arifle, 2 the stock thereof, 3 the trigger, 4 the trigger guard, and 5 atelescope. The telescope is embraced by two suitably spaced supportingrings 6, which are split as indicated at 'l and firmly clamped on thetelescope by screws 8 spanning the splits of such rings. The rings aresimilarly exteriorly formed lll with short supporting arms 9 whichreceive the` screws 8, and are drilled and tapped to further rigidlyreceive threaded portions of two aligned pivot pins I0. (See Fig. 6.)The axis of such pins is parallel to that of the telescope and also tothe rie barrel Ina. Said pins have nonthreaded portions rearwardlyprojecting from the arms 9 and journaled in bearings II formed on frontand rear mounting plates I2 and I3. These plates surmount the receiverand are fixed thereon by screws I3a at front and rear of an elongatedloading and ejection opening I4 in the receiver top. The bearings I Iare disposed above the receiver and at one side of the mediallongitudinal vertical plane of the receiver, thus establishing alocation of the pivot pins minimizing requisite length of the arms 9 andalso adapting their arcuate travel to Ibe a minimum. For reasonshereinafter stated, it is preferred to form each arm 9 with afrusto-conical rearwardly projecting annular boss I5, accommodating thepin I Il of such arm, said bosses fitting into conforming sockets in thefront ends of the bearings II. Also it is preferred to form the rearextremities of the pins I0 with heads I6 set into said bearings andcompressing springs I'l against internal shoulders I8 of the bearings.The illustrated springs I1 are of a split washer type.

The mounting plate I3 comprises a lug I9 projecting sufficiently forwardto serve as a seat for the rear clamping ring 6 when the telescope isdisposed for use. The telescope seats on the mounting plate I2independently of the front clamping ring, the latter having clearancefrom the receiver and said mounting, in positioning the telescope foruse. It is preferred to afford the telescope a travel of ninety degreesbetween its positions of use and non-use, the latter position beingestablished, as is clear from Fig. 4, by contact of the arms 9 with thereceiver.

It will be evident from preceding description that the construction isquite simple and hence relatively inexpensive, requiring no springs,other than the split spring washers I1, and no latches or detents. Thefrusto-conical bosses I5 inserted in the bearings I I provide for amplefrictional resistance to maintain either limiting position of thetelescope, such resistance being raised or lowered by increasing ordiminishing the compression imposed on the washers I1.

From the standpoint of resisting wear and prolonging the useful life ofthe described mounting, disposal of the two arms 9 to abut the frontends of the bearings Il is of importance. Recoil stresses thus cannot bedirectly transmitted from 3 the plates I2 and I3 to the arms 9 but mustact through the pins II), being imposed on the heads of said pins by theshoulders I8. Any wear on said shoulders or the pins may be readilytaken up by an adjustment of the pins in the arms.

`The coned bosses I5 in addition to their function of regulatingfriction, also serve to establish the true pivotal axis of the arms 9,eliminating such slight inaccuracy as might result from rotationalfreedom of the pins I0 in the bearings Il.

It will be understood that the telescope will have the usual internaladjustments for regulating the line of sight, these being no feature ofthe present invention.

One of the desirable features of the described mount is its ease ofinstallation and the fact that such installation requires no cuttingaway or other mutilation of the gun stock.

What I claim is:

1. In combination with the receiver of a gun and a sighting telescope, apair of front and rear mounting plates secured on and spacedlongitudinally of the receiver, a pair of rings clamped on and spacedlongitudinally of the telescope, a pair of arms respectively rigidlyprojecting from the respective rings, and means pivoting the arms onsaid plates in substantial parallelism with the telescope and with themedial vertical plane of the receiver, one of said plates extending 4.beneath the corresponding clamping ring in the use position of thetelescope and providing a seat for such ring.

2. The combination set forth in claim 1, said seat-forming plate beingthe rear plate, the tele scope having direct seating engagement with thefront mounting plate.

ROY E. ALLEN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,083,288 Lowe Jan. 6, 19141,742,699 Fellows Jan. 7, 1930 2,051,428 Tatlow Aug. 18, 1936 2,193,094Gilbert Mar. 12, 1940 2,425,130 Shelley Aug. 5, 1947 2,451,266Whittemore Oct. 12, 1948 2,452,145 Pike Oct. 26, 1948 FOREIGN PATENTSNumber Country Date 142,545 Germany 1903 468,237 Great Britain 1937663,177 France 1929

